It's also getting colder out. One of my cats basically ignores us during the summer. But during fall and winter he sleeps next us and lays in my lap all day.
I wonder if she isn't feeling good? I think maybe I've read something about some cats liking to stay extra close during that kind of time? You don't suppose she is one of those amazing animals that senses something wrong in their guardian's body (like cancer) do you? You may be on the right track about the construction crew though- the noise is probably making her feel ill at ease and she's wanting to comfort herself by being near you.
Maybe she just likes to cuddle.